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JP5173668B2 - Motor with reduction mechanism - Google Patents

Motor with reduction mechanism Download PDF

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Publication number
JP5173668B2
JP5173668B2 JP2008210023A JP2008210023A JP5173668B2 JP 5173668 B2 JP5173668 B2 JP 5173668B2 JP 2008210023 A JP2008210023 A JP 2008210023A JP 2008210023 A JP2008210023 A JP 2008210023A JP 5173668 B2 JP5173668 B2 JP 5173668B2
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Prior art keywords
worm wheel
housing portion
worm
wheel housing
motor
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JP2008210023A
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Japanese (ja)
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JP2010045955A (en
Inventor
浩之 内村
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Mitsuba Corp
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Mitsuba Corp
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Priority to JP2008210023A priority Critical patent/JP5173668B2/en
Priority to PCT/JP2009/064314 priority patent/WO2010021294A1/en
Priority to US13/058,991 priority patent/US8627745B2/en
Priority to CN200980132281.3A priority patent/CN102124636B/en
Priority to BRPI0917876-7A priority patent/BRPI0917876B1/en
Priority to EP09808230.8A priority patent/EP2320541B1/en
Publication of JP2010045955A publication Critical patent/JP2010045955A/en
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Publication of JP5173668B2 publication Critical patent/JP5173668B2/en
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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
    • H02K7/1163—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears where at least two gears have non-parallel axes without having orbital motion
    • H02K7/1166—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears where at least two gears have non-parallel axes without having orbital motion comprising worm and worm-wheel
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00—Power-operated mechanisms for wings
    • E05F15/60—Power-operated mechanisms for wings using electrical actuators
    • E05F15/603—Power-operated mechanisms for wings using electrical actuators using rotary electromotors
    • E05F15/665—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for vertically-sliding wings
    • E05F15/689—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for vertically-sliding wings specially adapted for vehicle windows
    • E05F15/697—Motor units therefor, e.g. geared motors
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/50—Application of doors, windows, wings or fittings thereof for vehicles
    • E05Y2900/53—Type of wing
    • E05Y2900/55—Windows
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
    • F16H1/04—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members
    • F16H1/12—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes
    • F16H1/16—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes comprising worm and worm-wheel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/039—Gearboxes for accommodating worm gears
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/08—Insulating casings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18568—Reciprocating or oscillating to or from alternating rotary
    • Y10T74/18792—Reciprocating or oscillating to or from alternating rotary including worm
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19642—Directly cooperating gears
    • Y10T74/19698—Spiral
    • Y10T74/19828—Worm
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2186—Gear casings

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Gear Transmission (AREA)
  • Motor Or Generator Frames (AREA)
  • Power-Operated Mechanisms For Wings (AREA)

Description

本発明は、モータ本体の回転を減速機構により減速させて被駆動部材に伝達する減速機構付モータに関する。   The present invention relates to a motor with a speed reduction mechanism that transmits rotation to a driven member by reducing the rotation of a motor body by a speed reduction mechanism.

車両に設けられるパワーウィンド装置やサンルーフ装置等の車両用自動開閉装置の駆動源としては、モータ本体と減速機構とを１つのユニットとした減速機構付モータが用いられる。減速機構付モータは、モータ本体の回転軸に形成されたウォームと当該ウォームに噛み合うウォームホイールとからなる減速機構によりモータ本体の回転を減速させて、その出力を被駆動部材であるウィンドガラス等の開閉体に伝達させており、減速機構付モータは小型でありながら大きな出力を得られるようになっている。   As a drive source for an automatic opening / closing device for a vehicle such as a power window device or a sunroof device provided in a vehicle, a motor with a speed reduction mechanism having a motor body and a speed reduction mechanism as one unit is used. The motor with a speed reduction mechanism decelerates the rotation of the motor main body by a speed reduction mechanism consisting of a worm formed on the rotation shaft of the motor main body and a worm wheel meshing with the worm, and outputs the output of a wind glass or the like as a driven member. The motor is transmitted to the opening / closing body, and the motor with the speed reduction mechanism is designed to obtain a large output while being small.

減速機構付モータは、回転軸のウォームが収容されるウォーム収容部と、ウォームホイールが収容されるウォームホイール収容部とが一体に形成されたギヤケースを有しており、ウォームとウォームホイールとがギヤケースの内部で噛み合うようになっている。ウォームホイール収容部は有底円筒形状となっており、ウォームホイールとともに回転する出力ギヤがウォームホイール収容部の開口部から突出した状態で、当該開口部にボトムカバーが組み付けられてウォームホイール収容部が密閉される。   The motor with a speed reduction mechanism has a gear case in which a worm housing portion in which a worm of a rotating shaft is housed and a worm wheel housing portion in which a worm wheel is housed, and the worm and the worm wheel are a gear case. It is designed to mesh with each other. The worm wheel housing portion has a bottomed cylindrical shape, and the output cover that rotates together with the worm wheel protrudes from the opening portion of the worm wheel housing portion, and the bottom cover is assembled to the opening portion so that the worm wheel housing portion is Sealed.

ウォームホイール収容部とボトムカバーとを組み付ける際には、ボトムカバーをウォームホイール収容部に圧入・接着・溶着等により固定する場合もあるが、ウォームホイール収容部とボトムカバーとの再組み付けが容易となるように、爪係合する複数の係止構造によりこれらを組み付けるのが一般的である。例えば、ボトムカバー（ギヤケース）の外周部からウォームホイール収容部（ギヤハウジング）の外壁表面に沿って延出された係止爪に溝を形成するとともに、当該溝に係合する凸片をウォームホイール収容部の外壁表面に設け、これら溝と凸片との係合によりウォームホイール収容部とボトムカバーとを組み付けるようにした減速機構付モータ（サンルーフ用駆動装置）が特許文献１に記載されている。
特開２００１−２９４０４４号公報 When assembling the worm wheel housing part and the bottom cover, the bottom cover may be fixed to the worm wheel housing part by press-fitting, bonding, welding, etc., but it is easy to reassemble the worm wheel housing part and the bottom cover. In general, these are assembled by a plurality of locking structures that engage with the claws. For example, a groove is formed in a locking claw that extends from the outer peripheral portion of the bottom cover (gear case) along the outer wall surface of the worm wheel housing portion (gear housing), and the convex piece that engages with the groove is a worm wheel. Patent Document 1 discloses a motor with a speed reduction mechanism (sunroof drive device) that is provided on the outer wall surface of the housing portion and is configured to assemble the worm wheel housing portion and the bottom cover by engaging the grooves and the convex pieces. .
JP 2001-294044 A

従来の係止構造においては、ウォームホイール収容部の外壁表面に沿うようにボトムカバーの外周部から延出された係止爪に形成される溝と、ウォームホイール収容部の外壁表面に設けられる凸片とにより、ウォームホイール収容部とボトムカバーとを組み付けるようにしており、係止爪を径方向外側に押し開くことで溝と凸片との係合を外し、メンテナンス時などにおいてウォームホイール収容部とボトムカバーとを容易に取り外しできるようになっている。   In the conventional locking structure, a groove formed in the locking claw extending from the outer peripheral portion of the bottom cover so as to follow the outer wall surface of the worm wheel housing portion, and a protrusion provided on the outer wall surface of the worm wheel housing portion. The worm wheel housing part and the bottom cover are assembled with each other, and the engagement between the groove and the convex piece is released by pushing the locking claw outward in the radial direction. And the bottom cover can be easily removed.

しかしながら、特許文献１に示す減速機構付モータにおいては、係止爪がウォームホイール収容部の外壁表面よりも径方向外側に配置され、その側面や先端面が露出しているため、ウォームホイール収容部とボトムカバーとの組み付け後に、係止爪に物が衝突するなどして、係止爪の破損もしくは係止爪による係合が外れるといったおそれがある。   However, in the motor with a speed reduction mechanism shown in Patent Document 1, the locking claw is disposed radially outside the outer wall surface of the worm wheel housing portion, and the side surface and the tip surface are exposed. There is a possibility that after the assembly of the bottom cover and the bottom cover, an object collides with the locking claw and the locking claw is broken or engaged by the locking claw.

本発明の目的は、係止爪の破損や係止爪の外れを防止することにある。   An object of the present invention is to prevent breakage of the locking claws and removal of the locking claws.

本発明の減速機構付モータは、アーマチュア軸を回転自在に支持するヨークと、前記アーマチュア軸と一体回転し、ウォームが設けられたウォーム軸と、前記ウォーム軸を収容するウォーム収容部と、前記ウォーム軸のウォームと噛み合うウォームホイールを収容する有底形状のウォームホイール収容部とを備え、前記ヨークが取り付けられるギヤケースと、前記ウォームホイール収容部の開口部を覆うボトムカバーとを有する減速機構付モータであって、前記ボトムカバーの外周部に設けられ、前記ウォームホイール収容部の外壁表面に沿って延びる係止爪と、前記係止爪または前記ウォームホイール収容部の外壁表面のいずれか一方に設けられ、前記係止爪または前記ウォームホイール収容部の外壁表面のいずれか他方に向けて突出する凸片と、前記係止爪または前記ウォームホイール収容部の外壁表面のいずれか他方に設けられ、前記凸片が挿入されて当該凸片と係合する溝と、前記ウォームホイール収容部の外壁表面に設けられ、前記係止爪の側面および先端面を覆う壁部とを有し、前記ボトムカバーには、前記ウォームホイール収容部を密閉し、前記ウォームホイールの回転が伝達されるシール部材を装着したことを特徴とする。
A motor with a speed reduction mechanism according to the present invention includes a yoke that rotatably supports an armature shaft, a worm shaft that rotates integrally with the armature shaft, and is provided with a worm, a worm housing portion that houses the worm shaft, and the worm A motor with a speed reduction mechanism, including a gear case to which the yoke is attached, and a bottom cover that covers the opening of the worm wheel housing portion. And provided on the outer peripheral portion of the bottom cover and extending along the outer wall surface of the worm wheel housing portion, and on either the locking claw or the outer wall surface of the worm wheel housing portion. , Projecting toward the other of the surface of the outer wall of the locking claw or the worm wheel housing portion A piece, a groove provided on one of the locking claw and the outer wall surface of the worm wheel housing portion, the groove on which the convex piece is inserted and engaged with the convex piece, and an outer wall surface of the worm wheel housing portion provided, it has a wall portion covering the side surfaces and tip end surface of the locking pawl, the bottom cover, to seal the worm wheel housing portion, equipped with a sealing member to which the rotation of the worm wheel is transmitted It is characterized by that.

本発明の減速機構付モータは、ウォームが設けられた回転軸を回転自在に支持するヨークと、前記ウォームを収容するウォーム収容部と、前記ウォームと噛み合うウォームホイールを収容する有底形状のウォームホイール収容部とを備え、前記ヨークが取り付けられるギヤケースと、前記ウォームホイール収容部の開口部を覆うボトムカバーとを有する減速機構付モータであって、前記ボトムカバーの外周部に設けられ、前記ウォームホイール収容部の外壁表面に沿って延びる係止爪と、前記係止爪または前記ウォームホイール収容部の外壁表面のいずれか一方に設けられ、前記係止爪または前記ウォームホイール収容部の外壁表面のいずれか他方に向けて突出する凸片と、前記係止爪または前記ウォームホイール収容部の外壁表面のいずれか他方に設けられ、前記凸片が挿入されて当該凸片と係合する溝と、前記ウォームホイール収容部の外壁表面に設けられ、前記係止爪の側面および先端面を覆う壁部とを有し、前記ボトムカバーには、前記ウォームホイール収容部を密閉し、前記ウォームホイールの回転が伝達されるシール部材を装着したことを特徴とする。 A motor with a speed reduction mechanism according to the present invention includes a yoke that rotatably supports a rotating shaft provided with a worm, a worm accommodating portion that accommodates the worm, and a bottomed worm wheel that accommodates a worm wheel that meshes with the worm. A motor with a reduction mechanism having a gear case to which the yoke is attached and a bottom cover that covers an opening of the worm wheel housing part, the worm wheel being provided on an outer peripheral part of the bottom cover, A locking claw extending along the outer wall surface of the housing portion, and provided on either the locking claw or the outer wall surface of the worm wheel housing portion, and either the locking claw or the outer wall surface of the worm wheel housing portion A convex piece projecting toward the other, either the locking claw or the outer wall surface of the worm wheel housing portion Provided on the other, closed and grooves to be engaged with the convex pieces the protruding piece is inserted, is provided on the outer wall surface of the worm wheel housing portion, and a wall portion covering the side surfaces and tip end surface of the locking pawl The bottom cover is provided with a seal member for sealing the worm wheel housing and transmitting the rotation of the worm wheel .

本発明の減速機構付モータは、前記壁部は前記係止爪の側面全体を覆うことを特徴とする。   In the motor with a speed reduction mechanism of the present invention, the wall portion covers the entire side surface of the locking claw.

本発明の減速機構付モータは、前記凸片および前記溝は、前記ウォームホイール収容部の径方向に形成された係合面により係合されることを特徴とする。   The motor with a speed reduction mechanism of the present invention is characterized in that the convex piece and the groove are engaged by an engagement surface formed in a radial direction of the worm wheel housing portion.

本発明の減速機構付モータは、前記壁部は前記係止爪よりも前記ウォームホイール収容部の径方向に対して外径側に突出して形成されていることを特徴とする。   The motor with a speed reduction mechanism of the present invention is characterized in that the wall portion is formed so as to protrude to the outer diameter side with respect to the radial direction of the worm wheel housing portion with respect to the locking claw.

本発明によれば、ウォームホイール収容部の外側表面よりも径方向外側に配置される係止爪の側面および先端面を覆う壁部をウォームホイール収容部の外側表面に設けるようにしたので、ウォームホイール収容部とボトムカバーとの組み付け後に、係止爪に物が衝突するなどして、係止爪の破損もしくは係止爪の係合が外れるといったことを防止することができる。   According to the present invention, the wall portion covering the side surface and the front end surface of the locking claw disposed on the radially outer side than the outer surface of the worm wheel housing portion is provided on the outer surface of the worm wheel housing portion. After the wheel housing portion and the bottom cover are assembled, it is possible to prevent the locking claw from being damaged or the locking claw from being disengaged due to an object colliding with the locking claw.

以下、本発明の実施の形態を図面に基づいて詳細に説明する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

図１は本発明の一実施の形態であるパワーウィンドモータの平面図であり、図２は図１におけるＡ−Ａ線に沿う断面図であり、図３はギヤ部の分解斜視図である。   1 is a plan view of a power window motor according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 3 is an exploded perspective view of a gear portion.

このパワーウィンドモータ１０は、車両に設けられるパワーウィンド装置に備えられ、ウィンドガラスを昇降させる図示しないウィンドレギュレータを駆動するものである。パワーウィンドモータ１０は、モータ本体１１と当該モータ本体１１の回転を減速させてウィンドレギュレータに伝達する減速機構とを１つのユニットとした減速機構付モータであり、図１に示すように、駆動源であるモータ本体１１と減速機構を備えるギヤ部１２とを有している。   The power window motor 10 is provided in a power window device provided in a vehicle, and drives a window regulator (not shown) that moves a window glass up and down. The power window motor 10 is a motor with a speed reduction mechanism in which a motor main body 11 and a speed reduction mechanism for reducing the rotation of the motor main body 11 and transmitting it to the window regulator are combined into one unit. As shown in FIG. A motor main body 11 and a gear portion 12 having a speed reduction mechanism.

モータ本体１１にはブラシ付直流モータが用いられ、モータ本体１１に設けられる回転軸１３（図１中に破線で示す）が正方向または逆方向に回転可能となっている。回転軸１３の一端側（図１中左側）は、一端が開口した開口部を有する有底筒形状のモータヨーク１４の底壁に設けられた図示しない軸受を介して回転自在に支持されており、モータ本体１１は、モータヨーク１４の開口部側に設けられるフランジ部１４ａにおいて、複数のボルト１５によりギヤ部１２のギヤケース１６に取り付けられている。   The motor body 11 is a DC motor with a brush, and a rotating shaft 13 (shown by a broken line in FIG. 1) provided in the motor body 11 can rotate in the forward direction or the reverse direction. One end side (left side in FIG. 1) of the rotating shaft 13 is rotatably supported via a bearing (not shown) provided on the bottom wall of the bottomed cylindrical motor yoke 14 having an opening with one end opened. The motor body 11 is attached to the gear case 16 of the gear portion 12 by a plurality of bolts 15 at a flange portion 14a provided on the opening side of the motor yoke 14.

樹脂製のギヤケース１６は、回転軸１３の軸方向に延びるとともにモータ本体１１側に開口するウォーム収容部１７を備えており、モータ本体１１はウォーム収容部１７の開口部１７ａ（図３参照）の端面に固定され、回転軸１３の他端側がウォーム収容部１７に収容されている。ウォーム収容部１７の開口部１７ａには、回転軸１３に設けられた整流子６１を介してモータ本体１１に給電するためのコネクタユニット６２およびブラシホルダ６３が装着されており、これら整流子６１、コネクタユニット６２およびブラシホルダ６３を介してモータ本体１１に駆動電流を供給することにより、回転軸１３が正方向または逆方向に回転駆動されるようになっている。回転軸１３は、モータヨーク１４に回転自在に支持されるアーマチュア軸１３ａと、ウォーム収容部１７に回転自在に支持されるウォーム軸１３ｂとにより構成された分割シャフト構造となっており、図２に示すように、アーマチュア軸１３ａと一体回転するウォーム軸１３ｂにはウォーム１８が一体に設けられている。   The resin gear case 16 includes a worm accommodating portion 17 that extends in the axial direction of the rotating shaft 13 and opens toward the motor main body 11, and the motor main body 11 has an opening 17 a (see FIG. 3) of the worm accommodating portion 17. It is fixed to the end surface, and the other end side of the rotating shaft 13 is accommodated in the worm accommodating portion 17. A connector unit 62 and a brush holder 63 for supplying power to the motor main body 11 via a commutator 61 provided on the rotating shaft 13 are attached to the opening 17a of the worm housing portion 17, and the commutator 61, By supplying a drive current to the motor body 11 via the connector unit 62 and the brush holder 63, the rotary shaft 13 is driven to rotate in the forward direction or the reverse direction. The rotary shaft 13 has a split shaft structure composed of an armature shaft 13a that is rotatably supported by the motor yoke 14 and a worm shaft 13b that is rotatably supported by the worm housing portion 17, as shown in FIG. As shown, a worm 18 is integrally provided on a worm shaft 13b that rotates integrally with the armature shaft 13a.

ギヤケース１６はウォーム収容部１７と一体に形成されたウォームホイール収容部１９を備えており、ウォームホイール収容部１９には、ウォーム軸１３ｂに形成されたウォーム１８に噛み合う歯部２０ａが外周部に形成されたウォームホイール２０が収容されている。ウォームホイール収容部１９は、円板形状に形成された底壁部１９ａと、その底壁部１９ａの外周部から出力軸２２の軸方向に延びる円筒壁部１９ｂとを有する有底円筒形状となっており、ギヤケース１６においてウォーム収容部１７の開口部１７ａと直交する方向に開口している。図２および図３に示すように、ウォームホイール収容部１９の軸心には底壁部１９ａから開口部側に向けて延出する円筒部２１が設けられており、この円筒部２１に形成された貫通孔２１ａには、ウォームホイール収容部１９における円筒壁部１９ｂの底壁部１９ａからの高さ寸法よりも長寸に形成された出力軸２２が、その先端部をウォームホイール収容部１９の開口部から突出させた状態で固定されている。   The gear case 16 includes a worm wheel housing portion 19 formed integrally with the worm housing portion 17, and the worm wheel housing portion 19 has teeth 20 a that engage with the worm 18 formed on the worm shaft 13 b formed on the outer peripheral portion. The worm wheel 20 is accommodated. The worm wheel housing portion 19 has a bottomed cylindrical shape having a bottom wall portion 19a formed in a disc shape and a cylindrical wall portion 19b extending in the axial direction of the output shaft 22 from the outer peripheral portion of the bottom wall portion 19a. The gear case 16 is open in a direction orthogonal to the opening 17a of the worm housing portion 17. As shown in FIGS. 2 and 3, a cylindrical portion 21 extending from the bottom wall portion 19 a toward the opening side is provided at the axial center of the worm wheel housing portion 19, and is formed in the cylindrical portion 21. In the through hole 21 a, an output shaft 22 formed longer than the height of the cylindrical wall portion 19 b from the bottom wall portion 19 a of the worm wheel housing portion 19 has a tip end portion of the worm wheel housing portion 19. It is fixed in a state of protruding from the opening.

ウォームホイール収容部１９に収容されるウォームホイール２０の径方向中心部には、ウォームホイール収容部１９の円筒部２１の外周面に摺動接触するボス部２０ｂが設けられており、このボス部２０ｂにおいて、ウォームホイール２０はウォームホイール収容部１９の内部で円筒部２１を軸にして回転自在に支持されている。また、ウォームホイール収容部１９の底壁部１９ａには、ウォームホイール２０側に突出する環状凸部２３が設けられており、当該環状凸部２３は、ウォームホイール２０の底壁部１９ａ側の端面に摺動接触し、ウォームホイール２０を摺動自在に支持している。   A boss portion 20b that is in sliding contact with the outer peripheral surface of the cylindrical portion 21 of the worm wheel housing portion 19 is provided at the radial center portion of the worm wheel 20 housed in the worm wheel housing portion 19, and this boss portion 20b. The worm wheel 20 is rotatably supported around the cylindrical portion 21 in the worm wheel housing portion 19. Further, the bottom wall portion 19a of the worm wheel housing portion 19 is provided with an annular convex portion 23 protruding toward the worm wheel 20 side, and the annular convex portion 23 is an end surface of the worm wheel 20 on the bottom wall portion 19a side. The worm wheel 20 is slidably supported.

ウォームホイール収容部１９は、ウォームホイール収容部１９の円筒壁部１９ｂにおける接線方向と回転軸１３の軸方向とがほぼ一致するように、ウォーム収容部１７に隣接して形成されており、ウォームホイール収容部１９の円筒壁部１９ｂのウォーム収容部１７側には、ウォーム収容部１７とウォームホイール収容部１９とを連通する連通孔２４が形成されている。ウォーム収容部１７に収容されるウォーム１８とウォームホイール収容部１９に収容されるウォームホイール２０の歯部２０ａとはこの連通孔２４を介して噛み合うようになっており、ギヤケース１６の内部で噛み合うこれらウォーム１８とウォームホイール２０とにより減速機構が構成されている。この減速機構は、モータ本体１１の回転駆動を所定の速度にまで減速させ、高トルク化された回転を出力するようになっている。   The worm wheel housing portion 19 is formed adjacent to the worm housing portion 17 so that the tangential direction of the cylindrical wall portion 19b of the worm wheel housing portion 19 and the axial direction of the rotary shaft 13 are substantially coincident with each other. A communication hole 24 that communicates the worm accommodating portion 17 and the worm wheel accommodating portion 19 is formed on the worm accommodating portion 17 side of the cylindrical wall portion 19 b of the accommodating portion 19. The worm 18 accommodated in the worm accommodating portion 17 and the tooth portion 20a of the worm wheel 20 accommodated in the worm wheel accommodating portion 19 are engaged with each other through the communication hole 24, and are engaged with each other inside the gear case 16. The worm 18 and the worm wheel 20 constitute a speed reduction mechanism. The speed reduction mechanism decelerates the rotational drive of the motor main body 11 to a predetermined speed and outputs a rotation with a high torque.

本実施の形態のパワーウィンドモータ１０においては、減速機構を構成するウォームホイールとしてダンパ付ウォームホイールを採用しており、上記のウォームホイール２０にダンパ部材２６と従動プレート２７とが組み付けられて、ウォームホイール２０の回転がダンパ部材２６および従動プレート２７を介してウィンドレギュレータに伝達されるようになっている。   In the power window motor 10 of the present embodiment, a worm wheel with a damper is adopted as a worm wheel constituting the speed reduction mechanism, and a damper member 26 and a follower plate 27 are assembled to the worm wheel 20 to form a worm wheel. The rotation of the wheel 20 is transmitted to the window regulator via the damper member 26 and the driven plate 27.

ウォームホイール２０の歯部２０ａが形成された外周部とウォームホイール２０の径方向中心に形成されたボス部２０ｂとの間には、ウォームホイール収容部１９の開口部側に向けて開口する環状の凹部２８が形成されている。図３に示すように、ウォームホイール２０は当該凹部２８内に突出する３つの突起部２９を備え、ウォームホイール２０の周方向に等間隔に設けられた各突起部２９により凹部２８が等間隔に区画されている。   Between the outer peripheral part where the tooth part 20a of the worm wheel 20 is formed and the boss part 20b formed at the radial center of the worm wheel 20, an annular shape opening toward the opening part side of the worm wheel housing part 19 is formed. A recess 28 is formed. As shown in FIG. 3, the worm wheel 20 includes three protrusions 29 protruding into the recess 28, and the recesses 28 are equally spaced by the protrusions 29 provided at equal intervals in the circumferential direction of the worm wheel 20. It is partitioned.

この凹部２８にはダンパ部材２６が装着されている。ダンパ部材２６は、周方向に等間隔に形成された６つの弾性部２６ａと、ダンパ部材２６の内周側においてそれぞれの弾性部２６ａを環状に一体に連結するための連結部２６ｂとを有しており、弾性部２６ａがウォームホイール２０における各突起部２９の周方向両側に隣接して、つまり各突起部２９の相互間に弾性部２６ａが２つ収容されるように配置されている。各弾性部２６ａの周方向両側の端面は、突起部２９の周方向両側の端面に対応した円弧形状となっており、ダンパ部材２６が凹部２８に装着されると、各弾性部２６ａの相互間にはウォームホイール２０の突起部２９と略同形状の収容部が形成され、６つの収容部のうち周方向に等間隔に位置する３つの収容部にウォームホイール２０の各突起部２９が嵌合される。   A damper member 26 is attached to the recess 28. The damper member 26 has six elastic portions 26a formed at equal intervals in the circumferential direction, and connecting portions 26b for connecting the respective elastic portions 26a in an annular shape integrally on the inner peripheral side of the damper member 26. The elastic portions 26a are arranged adjacent to both sides in the circumferential direction of the projections 29 in the worm wheel 20, that is, two elastic portions 26a are accommodated between the projections 29. The end surfaces on both sides in the circumferential direction of each elastic portion 26a have an arc shape corresponding to the end surfaces on both sides in the circumferential direction of the projection 29, and when the damper member 26 is mounted in the recess 28, the elastic portions 26a are connected to each other. The worm wheel 20 has substantially the same shape as the projections 29 of the worm wheel 20, and the projections 29 of the worm wheel 20 are fitted into three of the six accommodations that are equally spaced in the circumferential direction. Is done.

一方、従動プレート２７のウォームホイール２０側の端面には、ウォームホイール２０の突起部２９と略同一形状に形成された３つの突起部３０が周方向に等間隔に設けられており、６つの収容部のうちウォームホイール２０の各突起部２９が嵌合されていない他の３つの収容部に従動プレート２７の当該各突起部３０が嵌合される。つまり、ウォームホイール２０の凹部２８には、ウォームホイール２０の突起部２９と従動プレート２７の突起部３０とが等間隔に交互に配置され、これらの間にダンパ部材２６の弾性部２６ａが嵌合された状態となる。これにより、ウォームホイール２０の回転はウォームホイール２０の突起部２９からダンパ部材２６の弾性部２６ａを介して従動プレート２７の突起部３０に伝達されることとなる。また、従動プレート２７はウォームホイール２０に対してダンパ部材２６の弾性部２６ａが弾性変形する範囲内において相対回転可能となっており、これらが相対回転してダンパ部材２６が弾性変形されることにより、ウィンドレギュレータから伝達される衝撃を緩和できるようになっている。   On the other hand, on the end surface of the driven plate 27 on the worm wheel 20 side, three protrusions 30 formed in substantially the same shape as the protrusions 29 of the worm wheel 20 are provided at equal intervals in the circumferential direction. The three projections 30 of the follower plate 27 are fitted into the other three accommodating parts to which the projections 29 of the worm wheel 20 are not fitted. That is, the protrusions 29 of the worm wheel 20 and the protrusions 30 of the driven plate 27 are alternately arranged at equal intervals in the recess 28 of the worm wheel 20, and the elastic part 26 a of the damper member 26 is fitted between them. It will be in the state. Thereby, the rotation of the worm wheel 20 is transmitted from the protrusion 29 of the worm wheel 20 to the protrusion 30 of the driven plate 27 via the elastic part 26 a of the damper member 26. Further, the driven plate 27 can rotate relative to the worm wheel 20 within a range where the elastic portion 26a of the damper member 26 is elastically deformed, and these are relatively rotated to elastically deform the damper member 26. The shock transmitted from the window regulator can be reduced.

従動プレート２７は、ウォームホイール２０における凹部２８の開口部側を覆う大径部２７ａと、当該大径部２７ａの径方向内側からウォームホイール収容部１９の開口部側に向けて突出する小径部２７ｂとを有しており、大径部２７ａのウォームホイール２０側の端面には前述した各突起部３０が小径部２７ｂの突出方向とは反対方向に突出して設けられている。小径部２７ｂには、図２に示すように、軸方向一端側（図中上側）の端面にギヤ孔３１ａが形成されており、当該ギヤ孔３１ａに出力ギヤ３１が嵌め込まれている。   The driven plate 27 has a large diameter portion 27a that covers the opening side of the recess 28 in the worm wheel 20, and a small diameter portion 27b that protrudes from the radially inner side of the large diameter portion 27a toward the opening side of the worm wheel housing portion 19. The projections 30 described above are provided on the end surface of the large diameter portion 27a on the worm wheel 20 side so as to protrude in the direction opposite to the protruding direction of the small diameter portion 27b. As shown in FIG. 2, the small-diameter portion 27b has a gear hole 31a formed on an end face on one end side in the axial direction (upper side in the drawing), and the output gear 31 is fitted in the gear hole 31a.

従動プレート２７および出力ギヤ３１の軸心には出力軸２２が貫通しており、従動プレート２７および出力ギヤ３１は出力軸２２に回転自在に支持されている。また、出力ギヤ３１から突出した出力軸２２の当該部分の外周面には溝２２ａが形成されており、従動プレート２７および出力ギヤ３１は、当該溝２２ａに係止される係止部材３２により、弾性材料からなるＯリング３３を介してウォームホイール２０側に付勢され、ウォームホイール２０と係止部材３２との間で支持されている。モータ本体１１の回転軸１３（アーマチュア軸１３ａ、ウォーム軸１３ｂ）からウォームホイール２０を介して従動プレート２７に伝達された回転は、当該従動プレート２７とともに回転する出力ギヤ３１により、ウィンドレギュレータの駆動ギヤに伝達され、ウィンドガラスの昇降が行われる。   The output shaft 22 passes through the shaft center of the driven plate 27 and the output gear 31, and the driven plate 27 and the output gear 31 are rotatably supported by the output shaft 22. A groove 22a is formed on the outer peripheral surface of the portion of the output shaft 22 protruding from the output gear 31, and the driven plate 27 and the output gear 31 are locked by the locking member 32 locked to the groove 22a. It is biased toward the worm wheel 20 via an O-ring 33 made of an elastic material, and is supported between the worm wheel 20 and the locking member 32. The rotation transmitted from the rotating shaft 13 (armature shaft 13a, worm shaft 13b) of the motor body 11 to the driven plate 27 via the worm wheel 20 is driven by the output gear 31 that rotates together with the driven plate 27 to drive the wind regulator. The window glass is moved up and down.

従動プレート２７の小径部２７ｂおよび出力ギヤ３１はウォームホイール収容部１９の開口部から軸方向一端側に突出しており、これらが突出した状態のもとで当該開口部にボトムカバー３５が組み付けられる。ボトムカバー３５は、ウォームホイール収容部１９の開口部を覆う円板形状となっており、その径方向内側には従動プレート２７の小径部２７ｂよりも大径の突出孔３５ａが形成されており、当該突出孔３５ａから従動プレート２７の小径部２７ｂおよび出力ギヤ３１が突出されている。   The small-diameter portion 27b of the driven plate 27 and the output gear 31 protrude from the opening of the worm wheel housing portion 19 toward one end in the axial direction, and the bottom cover 35 is assembled to the opening under the protruding state. The bottom cover 35 has a disc shape that covers the opening of the worm wheel housing portion 19, and a projection hole 35 a having a larger diameter than the small diameter portion 27 b of the driven plate 27 is formed on the radially inner side thereof. The small diameter portion 27b and the output gear 31 of the driven plate 27 protrude from the protrusion hole 35a.

ボトムカバー３５の裏側（ウォームホイール収容部１９側）には弾性材料よりなるシール部材３６がアウトサート成形により装着されており、シール部材３６は、その径方向内側において従動プレート２７の小径部２７ｂの外周面に摺動接触するとともに、その径方向外側において円筒壁部１９ｂの内壁表面に押し付けられ、ウォームホイール収容部１９が密閉されて当該ウォームホイール収容部１９の内部へ雨水等が浸入することが防止されている。   A seal member 36 made of an elastic material is attached to the back side of the bottom cover 35 (the worm wheel housing portion 19 side) by outsert molding, and the seal member 36 is formed on the radially inner side of the small diameter portion 27b of the driven plate 27. While being in sliding contact with the outer peripheral surface, it is pressed against the inner wall surface of the cylindrical wall portion 19b on the outer side in the radial direction, the worm wheel housing portion 19 is sealed, and rainwater or the like infiltrates into the worm wheel housing portion 19. It is prevented.

次にボトムカバー３５をウォームホイール収容部１９に組み付けるための係止構造について説明する。   Next, a locking structure for assembling the bottom cover 35 to the worm wheel housing part 19 will be described.

図４はボトムカバーを裏側から見た斜視図であり、図５は図１におけるＢ−Ｂ線に沿う断面図であり、図６は図１における矢印Ｃで示す部分の拡大斜視図であり、図７は図１におけるＤ−Ｄ線に沿う断面図である。   4 is a perspective view of the bottom cover as seen from the back side, FIG. 5 is a cross-sectional view taken along line BB in FIG. 1, and FIG. 6 is an enlarged perspective view of a portion indicated by an arrow C in FIG. FIG. 7 is a sectional view taken along line DD in FIG.

図３および図４に示すように、ボトムカバー３５は周方向に等間隔に設けられた４つの係止爪３８ａ，３８ｂを有している。各係止爪３８ａ，３８ｂのうちウォーム収容部１７側、つまりウォームホイール収容部１９の円筒壁部１９ｂの外壁表面とウォーム収容部１７とが出力軸２２の軸方向に重なる位置に設けられる係止爪３８ａは、ボトムカバー３５の外周部から径方向外側に突出するとともにウォームホイール収容部１９側に短く突出する一対の爪部３９を備えている。各爪部３９は周方向に所定の間隔をあけて設けられており、各爪部３９の相互間に溝４０が形成されている。図５に示すように、各爪部３９の先端部には、爪部３９それぞれが相互に対向する側面（内面）から溝４０内に向けて突出する係合部４１が設けられており、当該係合部４１のボトムカバー３５側の軸方向端面には係合面４２が形成されている。   As shown in FIGS. 3 and 4, the bottom cover 35 has four locking claws 38 a and 38 b provided at equal intervals in the circumferential direction. The locking claw 38a, 38b is provided at a position where the worm housing portion 17 side, that is, the outer wall surface of the cylindrical wall portion 19b of the worm wheel housing portion 19 and the worm housing portion 17 overlap each other in the axial direction of the output shaft 22. The claw 38 a includes a pair of claw portions 39 that protrude radially outward from the outer peripheral portion of the bottom cover 35 and that protrude short toward the worm wheel housing portion 19. Each claw portion 39 is provided at a predetermined interval in the circumferential direction, and a groove 40 is formed between each claw portion 39. As shown in FIG. 5, an engagement portion 41 is provided at the tip of each claw portion 39 so as to protrude into the groove 40 from the side surface (inner surface) where the claw portions 39 face each other. An engagement surface 42 is formed on the end surface in the axial direction of the engagement portion 41 on the bottom cover 35 side.

各係止爪３８ａ，３８ｂのうちウォーム収容部１７側以外に設けられる他の３つの係止爪３８ｂは、図６に示すように、ボトムカバー３５の外周部から径方向外側に突出するとともにウォームホイール収容部１９の円筒壁部１９ｂの外壁表面に沿って当該ウォームホイール収容部１９側に延出している。各係止爪３８ｂの周方向中央部には、先端部４３を除いて溝４４が係止爪３８ｂの延出方向に形成されており、先端部４３のボトムカバー３５側の軸方向端面には径方向に平行な係合面４５が形成されている。   Of the locking claws 38a and 38b, the other three locking claws 38b provided on the side other than the worm accommodating portion 17 side protrude radially outward from the outer peripheral portion of the bottom cover 35 as shown in FIG. The wheel housing portion 19 extends toward the worm wheel housing portion 19 along the outer wall surface of the cylindrical wall portion 19b. A groove 44 is formed in the circumferential central portion of each locking claw 38b in the extending direction of the locking claw 38b except for the distal end portion 43, and on the axial end surface of the distal end portion 43 on the bottom cover 35 side. An engagement surface 45 parallel to the radial direction is formed.

一方、図１および図３に示すように、ウォームホイール収容部１９は、ボトムカバー３５の係止爪３８ａ，３８ｂに対応して係合される凸片４７ａ，４７ｂが、周方向に等間隔に設けられている。各凸片４７ａ，４７ｂのうちウォーム収容部１７側に設けられる凸片４７ａは、係止爪３８ａの溝４０に対応させて、円筒壁部１９ｂ（ウォームホイール収容部１９）の開口部側の端面からボトムカバー３５側に突出している。図５に示すように、凸片４７ａの周方向両側の基端部には、周方向内側に向けて切り欠かれたアンダーカット部４８が形成されており、凸片４７ａの周方向両側の先端部には係合面４９を有する係合部５２がアンダーカット部４８よりも周方向外側に向けて突出して形成されている。係合面４９は、アンダーカット部４８から略垂直方向に形成され、係合部５２を形成する面を示す。また、円筒壁部１９ｂの開口部側の端面には、凸片４７ａの形成位置の周方向両側において、軸方向他端側（図中下側）に向けて切り欠かれた切り欠き部５０が形成されている。係合面４９は、切り欠き部５０と対向するように配置され、かつ円筒壁部１９ｂの開口部側の端面を延長した面に形成されている。   On the other hand, as shown in FIGS. 1 and 3, the worm wheel housing portion 19 has convex pieces 47a and 47b that are engaged with the engaging claws 38a and 38b of the bottom cover 35 at equal intervals in the circumferential direction. Is provided. Of the convex pieces 47a and 47b, the convex piece 47a provided on the worm accommodating portion 17 side corresponds to the groove 40 of the locking claw 38a, and the end face on the opening side of the cylindrical wall portion 19b (worm wheel accommodating portion 19). It protrudes from the bottom cover 35 side. As shown in FIG. 5, undercut portions 48 that are notched inward in the circumferential direction are formed at the base end portions on both sides in the circumferential direction of the convex piece 47a, and the tips on both sides in the circumferential direction of the convex piece 47a. An engaging portion 52 having an engaging surface 49 is formed on the portion so as to protrude outward in the circumferential direction from the undercut portion 48. The engagement surface 49 is a surface that is formed in a substantially vertical direction from the undercut portion 48 and forms the engagement portion 52. In addition, on the end surface on the opening side of the cylindrical wall portion 19b, a cutout portion 50 cut out toward the other end side in the axial direction (lower side in the drawing) is formed on both sides in the circumferential direction of the formation position of the convex piece 47a. Is formed. The engagement surface 49 is disposed so as to face the notch 50 and is formed on a surface obtained by extending the end surface on the opening side of the cylindrical wall portion 19b.

各凸片４７ａ，４７ｂのうちウォーム収容部１７側以外に設けられる他の３つの凸片４７ｂは、図６に示すように、係止爪３８ｂの溝４４の軸方向他端側（図中下側）に対応させて、円筒壁部１９ｂの外壁表面から径方向外側に突出している。凸片４７ａは溝４４の軸方向他端側に挿入可能な形状となっており、凸片４７ｂの軸方向他端側の端面には径方向に延びる係合面５１が形成されている。   Of the convex pieces 47a and 47b, the other three convex pieces 47b provided on the side other than the worm housing portion 17 side are the other axial end of the groove 44 of the locking claw 38b (lower side in the figure), as shown in FIG. Corresponding to the outer wall surface of the cylindrical wall portion 19b. The convex piece 47a has a shape that can be inserted into the other axial end side of the groove 44, and an engaging surface 51 extending in the radial direction is formed on the end face of the convex piece 47b on the other axial end side.

ボトムカバー３５をウォームホイール収容部１９（ギヤケース１６）に組み付けるための係止構造は、これらボトムカバー３５に設けられる各係止爪３８ａ，３８ｂ（溝４０，４４）およびウォームホイール収容部１９に設けられる各凸片４７ａ，４７ｂにより構成されており、これらの組み付けを爪係合する複数の係止構造により行うため、メンテナンス時などにおけるボトムカバー３５とウォームホイール収容部１９との解体や再組み付けが容易となっている。   The locking structure for assembling the bottom cover 35 to the worm wheel housing part 19 (gear case 16) is provided in each of the locking claws 38a and 38b (grooves 40 and 44) provided in the bottom cover 35 and the worm wheel housing part 19. Are formed by a plurality of locking structures that engage the claws, so that the bottom cover 35 and the worm wheel housing portion 19 can be disassembled and reassembled during maintenance or the like. It has become easy.

図５に示すように、ボトムカバー３５のウォーム収容部１７側に設けられる係止構造としての係止爪３８ａおよびギアケース１６に形成される凸片４７ａは、係止爪３８ａの一対の爪部３９を円筒壁部１９ｂの開口部側の端面に形成された切り欠き部５０に入り込ませて凸片４７ａを溝４０内に挿入し、各爪部３９の係合部４１が凸片４７ａの係合部５２に引っ掛け固定されることにより組み付けられる。つまり、爪部３９における係合部４１の係合面４２と凸片４７ａの係合面４９とが係合されることにより、係止爪３８ａと凸片４７ａとが固定される。   As shown in FIG. 5, a locking claw 38a as a locking structure provided on the worm housing portion 17 side of the bottom cover 35 and a convex piece 47a formed on the gear case 16 are a pair of claw portions of the locking claw 38a. 39 is inserted into the notch 50 formed on the end surface of the cylindrical wall portion 19b on the opening side, and the convex piece 47a is inserted into the groove 40, and the engaging portion 41 of each claw portion 39 is engaged with the convex piece 47a. It is assembled by being hooked and fixed to the joint portion 52. That is, the engaging claw 38a and the convex piece 47a are fixed by engaging the engaging surface 42 of the engaging part 41 and the engaging surface 49 of the convex piece 47a in the claw part 39.

一方、図６に示すように、ウォーム収容部１７側以外に設けられる係止構造としての係止爪３８ｂおよび凸片４７ｂは、凸片４７ｂを溝４４の軸方向他端側に挿入し、係止爪３８ｂの先端部４３を凸片４７ｂに引っ掛け固定させることにより組み付けられる。つまり、先端部４３の係合面４５と凸片４７ｂの係合面５１とが係合されることにより、係止爪３８ｂと凸片４７ｂとが固定される。   On the other hand, as shown in FIG. 6, the locking claw 38 b and the convex piece 47 b as a locking structure provided on the side other than the worm housing portion 17 side insert the convex piece 47 b into the other axial end side of the groove 44. It is assembled by hooking and fixing the tip 43 of the pawl 38b to the convex piece 47b. That is, the engaging claw 38b and the convex piece 47b are fixed by engaging the engaging surface 45 of the tip 43 and the engaging surface 51 of the convex piece 47b.

このように、ウォーム収容部１７側の係止構造として、側面から突出する係合部４１を備える溝４０をボトムカバー３５の外周部に設けるとともに、溝４０内に挿入されて係合部４１に係合する凸片４７ａをウォームホイール収容部１９の開口部側の端部に設けるようにしたので、係止爪３８ｂおよび凸片４７ｂからなる係止構造を設ける場合に比して小スペースでの固定が可能となり、円筒壁部１９ｂの外壁表面に十分なスペースが確保することができないウォーム収容部１７側においても、ギヤケース１６の厚みを増加させることなく、係止構造を設けることができる。したがって、ウォーム収容部１７側に係止構造を設けることにより、各係止構造の相互間の間隔を縮めることができ、ウォームホイール収容部１９とボトムカバー３５との間に十分な係止力を持たせることが可能となり、ウォームホイール収容部１９が確実にシールされることとなる。   As described above, as the locking structure on the worm housing portion 17 side, the groove 40 including the engaging portion 41 protruding from the side surface is provided in the outer peripheral portion of the bottom cover 35 and is inserted into the groove 40 to be engaged with the engaging portion 41. Since the projecting piece 47a to be engaged is provided at the end of the worm wheel accommodating portion 19 on the opening side, it is possible to reduce the space in a smaller space as compared with the case where a locking structure including the locking claw 38b and the protruding piece 47b is provided. The locking structure can be provided without increasing the thickness of the gear case 16 even on the worm housing portion 17 side where the fixing is possible and a sufficient space cannot be secured on the outer wall surface of the cylindrical wall portion 19b. Therefore, by providing a locking structure on the worm housing portion 17 side, the interval between the respective locking structures can be reduced, and a sufficient locking force is provided between the worm wheel housing portion 19 and the bottom cover 35. Thus, the worm wheel housing part 19 is surely sealed.

また、ウォーム収容部１７側に係止構造を設けることにより、各係止構造をウォームホイール収容部１９の周方向に等間隔（対称位置）に設けることができ、バランスのとれた組み付けが可能となるとともに、車両の進行方向の左右両側に設けられるパワーウィンド装置のパワーウィンドモータ１０においてボトムカバー３５を共用することが可能となる。   In addition, by providing a locking structure on the worm housing portion 17 side, each locking structure can be provided at equal intervals (symmetrical positions) in the circumferential direction of the worm wheel housing portion 19, and a balanced assembly is possible. In addition, it is possible to share the bottom cover 35 in the power window motor 10 of the power window device provided on both the left and right sides in the traveling direction of the vehicle.

なお、本実施の形態においては、係止爪３８ａ（溝４０）および凸片４７ａにより構成される係止構造をウォーム収容部１７側のみに適用するようにしたが、この係止構造は少なくともウォーム収容部１７側に適用すればよく、その他の位置における係止構造に適用してもよいことはもちろんである。さらに、本実施の形態においては、ボトムカバー３５に溝４０，４４を設け、ウォームホイール収容部１９に凸片４７ａ，４７ｂを設けるようにしたが、ボトムカバー３５に凸片４７ａ，４７ｂを設け、ウォームホイール収容部１９の開口部側の端部に溝４０，４４を設けるようにしてもよい。   In the present embodiment, the locking structure constituted by the locking claw 38a (groove 40) and the convex piece 47a is applied only to the worm accommodating portion 17 side. Of course, it may be applied to the accommodating portion 17 side, and may be applied to the locking structure at other positions. Further, in the present embodiment, the grooves 40 and 44 are provided in the bottom cover 35, and the convex pieces 47a and 47b are provided in the worm wheel housing portion 19, but the convex pieces 47a and 47b are provided in the bottom cover 35, You may make it provide the groove | channels 40 and 44 in the edge part by the side of the opening part of the worm wheel accommodating part 19. FIG.

図６に示すように、ウォームホイール収容部１９の円筒壁部１９ｂの外壁表面には、係止爪３８ｂと凸片４７ｂとが組み付けられた際に、係止爪３８ｂの周方向両側の側面と軸方向一端側の先端面とを覆う壁部５３，５４が設けられている。係止爪３８ｂの側面を覆う壁部５３は、円筒壁部１９ｂの開口部側の端面から底壁部１９ａ側の端面にかけて出力軸２２の軸方向に形成されるとともに、円筒壁部１９ｂの外壁表面からの突出方向である径方向高さ寸法が、ボトムカバー３５に形成された係止爪３８ｂの径方向外側の端面までの径方向高さ寸法（係止爪３８ｂの径方向高さ寸法）よりも大きく形成されており、壁部５３は係止爪３８ｂの側面全体を覆う形状となっている。   As shown in FIG. 6, when the locking claw 38b and the convex piece 47b are assembled on the outer wall surface of the cylindrical wall portion 19b of the worm wheel housing portion 19, side surfaces on both sides in the circumferential direction of the locking claw 38b Wall portions 53 and 54 are provided to cover the distal end surface on one end side in the axial direction. The wall portion 53 that covers the side surface of the locking claw 38b is formed in the axial direction of the output shaft 22 from the end surface on the opening side of the cylindrical wall portion 19b to the end surface on the bottom wall portion 19a side, and the outer wall of the cylindrical wall portion 19b. The radial height dimension that is the protruding direction from the surface is the radial height dimension to the radially outer end face of the locking claw 38b formed on the bottom cover 35 (the radial height dimension of the locking claw 38b). The wall portion 53 has a shape that covers the entire side surface of the locking claw 38b.

円筒壁部１９ｂの底壁部１９ａ側には、係止爪３８ｂの先端面を覆う壁部５４がそれぞれの壁部５３から互いに近接する方向に形成されており、壁部５３と同様に、その径方向高さ寸法が係止爪３８ｂの径方向高さ寸法よりも大きく形成されている。壁部５４はその周方向中央部が切り欠かれており、メンテナンス時などにおいて係止爪３８ｂを径方向外側に押し開いて溝４４（係止爪３８ｂ）と凸片４７ｂとの係合を外す際に、係止爪３８ｂの先端部４３に指を掛け易い形状となっている。   On the bottom wall portion 19a side of the cylindrical wall portion 19b, a wall portion 54 that covers the distal end surface of the locking claw 38b is formed in a direction approaching each other from the respective wall portions 53. The radial height dimension is formed larger than the radial height dimension of the locking claw 38b. The wall portion 54 is cut out in the center in the circumferential direction, and the locking claw 38b is pushed outward in the radial direction during maintenance or the like to disengage the groove 44 (the locking claw 38b) from the convex piece 47b. At this time, it is easy to put a finger on the tip 43 of the locking claw 38b.

このように、円筒壁部１９ｂの外壁表面よりも径方向外側に配置される係止爪３８ｂの側面および先端面を覆う壁部５３，５４を円筒壁部１９ｂの外側表面に設けるようにしたので、ウォームホイール収容部１９とボトムカバー３５との組み付け後に、係止爪３８ｂに物が衝突するなどして、係止爪３８ｂの破損もしくは係止爪３８ｂの係合が外れるといったことを防止することができる。   As described above, the wall portions 53 and 54 that cover the side surface and the distal end surface of the locking claw 38b disposed radially outside the outer wall surface of the cylindrical wall portion 19b are provided on the outer surface of the cylindrical wall portion 19b. After the worm wheel housing portion 19 and the bottom cover 35 are assembled, it is possible to prevent the locking claw 38b from being damaged or the locking claw 38b from being disengaged due to an object colliding with the locking claw 38b. Can do.

なお、本実施の形態においては、係止爪３８ｂの先端面を覆う壁部５４をその周方向中央部が切り欠かれた形状とし、溝４４と凸片４７ｂとの係合を外す際に係止爪３８ｂの先端部４３に指を掛け易くなるようにしたが、壁部５４により係止爪３８ｂの先端面全体を覆うようにしてもよい。また、本実施の形態においては、係合爪３８ｂが壁部５３，５４よりも径方向外側に突出しないように、壁部５３，５４の径方向高さ寸法を係止爪３８ｂの径方向高さ寸法よりも大きく形成するようにしたが、壁部５３，５４の径方向高さ寸法を係止爪３８ｂの径方向高さ寸法と等しく形成するようにしてもよい。   In the present embodiment, the wall portion 54 that covers the distal end surface of the locking claw 38b has a shape in which the central portion in the circumferential direction is cut out, and the engagement is performed when the engagement between the groove 44 and the convex piece 47b is released. Although it is made easy to put a finger on the tip 43 of the pawl 38b, the wall 54 may cover the entire tip of the locking pawl 38b. Further, in the present embodiment, the height in the radial direction of the wall portions 53 and 54 is set so that the engagement claw 38b does not protrude radially outward from the wall portions 53 and 54. However, the wall portions 53 and 54 may be formed to have the same height in the radial direction as that of the locking claw 38b.

図４に示すように、ボトムカバー３５の裏面に装着されるシール部材３６は、その外周部３６ａ（図７参照）において、径方向外側に突出する２つの環状の径方向突起部５６と、ウォームホイール収容部１９側に向けて軸方向に突出する４つの円弧形状の軸方向突起部５７とを備えており、当該軸方向突起部５７は、係止爪３８ａ，３８ｂが設けられる箇所に対応させて、周方向に等間隔に設けられている。   As shown in FIG. 4, the sealing member 36 mounted on the back surface of the bottom cover 35 has two annular radial protrusions 56 projecting radially outward at the outer peripheral portion 36a (see FIG. 7), and a worm. There are four arc-shaped axial projections 57 projecting in the axial direction toward the wheel housing portion 19, and the axial projections 57 correspond to the locations where the locking claws 38 a and 38 b are provided. Are provided at equal intervals in the circumferential direction.

一方、図７に示すように、ウォームホイール収容部１９の円筒壁部１９ｂの先端部には、その径方向内側において一部切り欠かれた切り欠き部５８が形成されており、円筒壁部１９ｂの先端部の内壁表面には返し構造としての環状の段差部５９が設けられている。この段差部５９の軸方向端面には、径方向外側に向かうにつれて軸方向他端側（図中下側）に傾斜する斜面６０が形成されている。   On the other hand, as shown in FIG. 7, a cutout portion 58 that is partly cut out on the radially inner side is formed at the tip of the cylindrical wall portion 19 b of the worm wheel housing portion 19. An annular stepped portion 59 is provided as a turning structure on the inner wall surface of the tip of the. On the axial end surface of the stepped portion 59, a slope 60 is formed that inclines toward the other end side in the axial direction (lower side in the figure) as it goes radially outward.

ウォームホイール収容部１９とボトムカバー３５とが組み付けられると、シール部材３６の外周部３６ａが円筒壁部１９ｂの先端部に設けられた切り欠き部５８に入り込み、シール部材３６の径方向突起部５６が切り欠き部５８の径方向端面であるシール面５８ａに押し付けられるとともに、シール部材３６の軸方向突起部５７が段差部５９の斜面６０に押し付けられる。このとき、ボトムカバー３５と円筒壁部１９ｂの先端面との間には所定の隙間Ｄが形成されており、この隙間Ｄを設けることで、軸方向突起部５７を押し縮めることによりボトムカバー３５をウォームホイール収容部１９に向けて軸方向に相対移動させて、係合爪３８ｂの係合面４５と凸片４７ｂの係合面５１とを離反させることが可能となり、ウォームホイール収容部１９とボトムカバー３５との解体や組み付けが容易に行えるようになっている。   When the worm wheel housing part 19 and the bottom cover 35 are assembled, the outer peripheral part 36a of the seal member 36 enters the notch part 58 provided at the front end part of the cylindrical wall part 19b, and the radial protrusion 56 of the seal member 36. Is pressed against the seal surface 58a which is the radial end surface of the notch 58, and the axial projection 57 of the seal member 36 is pressed against the inclined surface 60 of the step 59. At this time, a predetermined gap D is formed between the bottom cover 35 and the front end surface of the cylindrical wall portion 19b. By providing this gap D, the axial projection 57 is pressed and shrunk to thereby bottom cover 35. Can be moved relative to each other in the axial direction toward the worm wheel housing portion 19 so that the engagement surface 45 of the engagement claw 38b and the engagement surface 51 of the convex piece 47b can be separated from each other. The bottom cover 35 can be easily disassembled and assembled.

径方向突起部５６が円筒壁部１９ｂのシール面５８ａに押し付けられると、ウォームホイール収容部１９がシールされるとともに、ボトムカバー３５がウォームホイール収容部１９に対して径方向に相対移動することが抑制されて、径方向突起部５６によりボトムカバー３５とウォームホイール収容部１９との間の径方向のガタが抑制されることとなる。   When the radial protrusion 56 is pressed against the sealing surface 58a of the cylindrical wall portion 19b, the worm wheel housing portion 19 is sealed and the bottom cover 35 may move relative to the worm wheel housing portion 19 in the radial direction. The radial play between the bottom cover 35 and the worm wheel housing part 19 is suppressed by the radial protrusions 56.

一方、軸方向突起部５７が段差部５９の斜面６０に押し付けられると、軸方向突起部５７によりボトムカバー３５とウォームホイール収容部１９とを離反させる方向、つまり係合爪３８ｂの係合面４５と凸片４７ｂの係合面５１とを強固に係合させる方向に軸方向の緊迫荷重が加えられる。これにより、ボトムカバー３５がウォームホイール収容部１９に対して軸方向に相対移動することが抑制されて、軸方向突起部５７によりボトムカバー３５とウォームホイール収容部１９との間の軸方向のガタが抑制されることとなる。また、斜面６０により軸方向突起部５７が径方向外側に案内されるため、軸方向突起部５７が段差部５９よりも径方向内側に入り込むことが防止されるとともに、シール部材３６が積極的に円筒壁部１９ｂのシール面５８ａに押し付けられるようになる。   On the other hand, when the axial projection 57 is pressed against the inclined surface 60 of the step 59, the axial projection 57 separates the bottom cover 35 and the worm wheel housing portion 19, that is, the engagement surface 45 of the engagement claw 38b. A tension load in the axial direction is applied in a direction to firmly engage the engagement surface 51 of the convex piece 47b. As a result, the bottom cover 35 is restrained from moving in the axial direction relative to the worm wheel housing portion 19, and the axial protrusion between the bottom cover 35 and the worm wheel housing portion 19 is prevented by the axial projection 57. Will be suppressed. Further, since the axial projection 57 is guided radially outward by the inclined surface 60, the axial projection 57 is prevented from entering radially inward of the stepped portion 59, and the seal member 36 is positively engaged. It comes to be pressed against the sealing surface 58a of the cylindrical wall portion 19b.

このように、シール部材３６の外周部に軸方向に突出する軸方向突起部５７を設けるとともに、軸方向突起部５７が押し付けられて当該軸方向突起部５７を径方向外側に案内する斜面６０を備える段差部５９をウォームホイール収容部１９の内壁表面に設けるようにしたので、ボトムカバー３５とウォームホイール収容部１９との間の軸方向のガタが抑制され、ガタによる異音の発生を防止することができる。また、斜面６０により軸方向突起部５７が径方向外側に案内されるため、軸方向突起部５７が段差部５９よりも径方向内側に入り込むことが防止されるとともに、シール部材３６が積極的に円筒壁部１９ｂのシール面５８ａに押し付けられ、確実にガタが抑制されることとなる。   In this way, the axial protrusion 57 that protrudes in the axial direction is provided on the outer peripheral portion of the seal member 36, and the inclined surface 60 that guides the axial protrusion 57 to the radially outer side when the axial protrusion 57 is pressed. Since the provided step portion 59 is provided on the inner wall surface of the worm wheel housing portion 19, the axial play between the bottom cover 35 and the worm wheel housing portion 19 is suppressed, and the generation of noise due to the play is prevented. be able to. Further, since the axial projection 57 is guided radially outward by the inclined surface 60, the axial projection 57 is prevented from entering radially inward of the stepped portion 59, and the seal member 36 is positively engaged. It is pressed against the seal surface 58a of the cylindrical wall portion 19b, and the play is surely suppressed.

なお、本実施の形態においては、円弧形状の軸方向突起部５７を係止爪３８ａ，３８ｂが設けられる箇所に対応させて４カ所に設けることにより、軸方向突起部５７を環状に設ける場合に比して軸方向の緊迫加重を低減するようにしたが、軸方向突起部５７を環状に設けるようにしてもよいことはもちろんである。   In the present embodiment, the arc-shaped axial projection 57 is provided at four locations corresponding to the locations where the locking claws 38a and 38b are provided, so that the axial projection 57 is provided in an annular shape. In contrast, although the axial tension load is reduced, the axial protrusion 57 may be provided in an annular shape.

本発明は前記実施の形態に限定されるものではなく、その要旨を逸脱しない範囲で種々変更可能であることはいうまでもない。例えば、前記実施の形態においては、本発明の減速機構付モータを、車両のウィンドガラスを昇降させるパワーウィンド装置のパワーウィンドモータ１０に適用したものを示したが、本発明はこれに限らず、車両に搭載されるワイパ装置や電動サンルーフ装置等の駆動源にも適用することができる。   It goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, in the above embodiment, the motor with the speed reduction mechanism of the present invention is applied to the power window motor 10 of the power window device that lifts and lowers the windshield of the vehicle, but the present invention is not limited to this. The present invention can also be applied to a drive source such as a wiper device or an electric sunroof device mounted on a vehicle.

また、前記実施の形態においては、駆動源としてのモータ本体１１にはブラシ付直流モータが用いられているが、これに限らず、回転軸１３を正逆両方向に回転駆動することができるものであれば、例えば、ブラシレスの電動モータ等を用いるようにしてもよい。   Moreover, in the said embodiment, although the DC motor with a brush is used for the motor main body 11 as a drive source, it is not restricted to this, The rotating shaft 13 can be rotationally driven in both forward and reverse directions. For example, a brushless electric motor or the like may be used.

さらに、前記実施の形態においては、減速機構のウォームホイールとしてダンパ付ウォームホイールを採用したが、ダンパ部材２６および従動プレート２７を設けないようにしたダンパレスのウォームホイールを採用するようにしてもよい。   Furthermore, although the damper-equipped worm wheel is employed as the worm wheel of the speed reduction mechanism in the above-described embodiment, a damper-less worm wheel in which the damper member 26 and the driven plate 27 are not provided may be employed.

本発明の一実施の形態であるパワーウィンドモータの平面図である。It is a top view of the power window motor which is one embodiment of the present invention. 図１におけるＡ−Ａ線に沿う断面図である。It is sectional drawing which follows the AA line in FIG. ギヤ部の分解斜視図である。It is a disassembled perspective view of a gear part. ボトムカバーを裏側から見た斜視図である。It is the perspective view which looked at the bottom cover from the back side. 図１におけるＢ−Ｂ線に沿う断面図である。It is sectional drawing which follows the BB line in FIG. 図１における矢印Ｃで示す部分の拡大斜視図である。It is an expansion perspective view of the part shown by the arrow C in FIG. 図１におけるＤ−Ｄ線に沿う断面図である。It is sectional drawing which follows the DD line | wire in FIG.

符号の説明Explanation of symbols

１０ パワーウィンドモータ（減速機構付モータ）
１１ モータ本体
１２ ギヤ部
１３ 回転軸
１３ａ アーマチュア軸
１３ｂ ウォーム軸
１４ モータヨーク
１４ａ フランジ部
１５ ボルト
１６ ギヤケース
１７ ウォーム収容部
１７ａ 開口部
１８ ウォーム
１９ ウォームホイール収容部
１９ａ 底壁部
１９ｂ 円筒壁部
２０ ウォームホイール
２０ａ 歯部
２０ｂ ボス部
２１ 円筒部
２１ａ 貫通孔
２２ 出力軸
２２ａ 溝
２３ 環状凸部
２４ 連通孔
２６ ダンパ部材
２６ａ 弾性部
２６ｂ 連結部
２７ 従動プレート
２７ａ 大径部
２７ｂ 小径部
２８ 凹部
２９ 突起部
３０ 突起部
３１ 出力ギヤ
３１ａ ギヤ孔
３２ 係止部材
３３ Ｏリング
３５ ボトムカバー
３５ａ 突出孔
３６ シール部材
３８ａ，３８ｂ 係止爪
３９ 爪部
４０ 溝
４１ 係合部
４２ 係合面
４３ 先端部
４４ 溝
４５ 係合面
４７ａ，４７ｂ 凸片
４８ アンダーカット部
４９ 係合面
５０ 切り欠き部
５１ 係合面
５２ 係合部
５３，５４ 壁部
５６ 径方向突起部
５７ 軸方向突起部
５８ 切り欠き部
５８ａ シール面
５９ 段差部（返し構造）
６０ 斜面
６１ 整流子
６２ コネクタユニット
６３ ブラシホルダ
Ｄ 隙間 10 Power window motor (motor with reduction mechanism)
DESCRIPTION OF SYMBOLS 11 Motor main body 12 Gear part 13 Rotating shaft 13a Armature shaft 13b Worm shaft 14 Motor yoke 14a Flange part 15 Bolt 16 Gear case 17 Worm accommodating part 17a Opening part 18 Warm 19 Worm wheel accommodating part 19a Bottom wall part 19b Cylindrical wall part 20 Worm wheel 20a tooth portion 20b boss portion 21 cylindrical portion 21a through hole 22 output shaft 22a groove 23 annular convex portion 24 communication hole 26 damper member 26a elastic portion 26b connecting portion 27 driven plate 27a large diameter portion 27b small diameter portion 28 concave portion 29 protruding portion 30 protrusion Portion 31 Output gear 31a Gear hole 32 Locking member 33 O-ring 35 Bottom cover 35a Protrusion hole 36 Seal member 38a, 38b Locking claw 39 Claw portion 40 Groove 41 Engagement portion 42 Engagement surface 43 Tip portion 44 Groove 45 Engagement Surfaces 47a and 47b Convex piece 48 Undercut part 49 Engagement surface 50 Notch part 51 Engagement surface 52 Engagement part 53, 54 Wall part 56 Radial direction projection part 57 Axial direction projection part 58 Notch part 58a Seal surface 59 Stepped part (Return structure) )
60 slope 61 commutator 62 connector unit 63 brush holder D gap

Claims (5)

アーマチュア軸を回転自在に支持するヨークと、
前記アーマチュア軸と一体回転し、ウォームが設けられたウォーム軸と、
前記ウォーム軸を収容するウォーム収容部と、前記ウォーム軸のウォームと噛み合うウォームホイールを収容する有底形状のウォームホイール収容部とを備え、前記ヨークが取り付けられるギヤケースと、
前記ウォームホイール収容部の開口部を覆うボトムカバーとを有する減速機構付モータであって、
前記ボトムカバーの外周部に設けられ、前記ウォームホイール収容部の外壁表面に沿って延びる係止爪と、
前記係止爪または前記ウォームホイール収容部の外壁表面のいずれか一方に設けられ、前記係止爪または前記ウォームホイール収容部の外壁表面のいずれか他方に向けて突出する凸片と、
前記係止爪または前記ウォームホイール収容部の外壁表面のいずれか他方に設けられ、前記凸片が挿入されて当該凸片と係合する溝と、
前記ウォームホイール収容部の外壁表面に設けられ、前記係止爪の側面および先端面を覆う壁部とを有し、
前記ボトムカバーには、前記ウォームホイール収容部を密閉し、前記ウォームホイールの回転が伝達されるシール部材を装着したことを特徴とする減速機構付モータ。 A yoke that rotatably supports the armature shaft;
A worm shaft that rotates integrally with the armature shaft and is provided with a worm;
A gear case that includes a worm housing portion that houses the worm shaft and a bottomed worm wheel housing portion that houses a worm wheel that meshes with the worm of the worm shaft;
A motor with a speed reduction mechanism having a bottom cover that covers the opening of the worm wheel housing portion,
A locking claw provided on the outer periphery of the bottom cover and extending along the outer wall surface of the worm wheel housing portion;
A convex piece that is provided on either the locking claw or the outer wall surface of the worm wheel housing portion and projects toward the other of the locking claw or the outer wall surface of the worm wheel housing portion;
A groove that is provided on the other surface of the locking claw or the outer wall surface of the worm wheel housing portion, and into which the convex piece is inserted to engage with the convex piece;
Wherein provided on the outer wall surface of the worm wheel housing portion, it has a wall portion covering the side surfaces and tip end surface of the locking pawl,
A motor with a speed reduction mechanism, wherein the bottom cover is provided with a seal member that seals the worm wheel housing and transmits the rotation of the worm wheel . ウォームが設けられた回転軸を回転自在に支持するヨークと、
前記ウォームを収容するウォーム収容部と、前記ウォームと噛み合うウォームホイールを収容する有底形状のウォームホイール収容部とを備え、前記ヨークが取り付けられるギヤケースと、
前記ウォームホイール収容部の開口部を覆うボトムカバーとを有する減速機構付モータであって、
前記ボトムカバーの外周部に設けられ、前記ウォームホイール収容部の外壁表面に沿って延びる係止爪と、
前記係止爪または前記ウォームホイール収容部の外壁表面のいずれか一方に設けられ、前記係止爪または前記ウォームホイール収容部の外壁表面のいずれか他方に向けて突出する凸片と、
前記係止爪または前記ウォームホイール収容部の外壁表面のいずれか他方に設けられ、前記凸片が挿入されて当該凸片と係合する溝と、
前記ウォームホイール収容部の外壁表面に設けられ、前記係止爪の側面および先端面を覆う壁部とを有し、
前記ボトムカバーには、前記ウォームホイール収容部を密閉し、前記ウォームホイールの回転が伝達されるシール部材を装着したことを特徴とする減速機構付モータ。 A yoke that rotatably supports a rotating shaft provided with a worm;
A gear case to which the yoke is attached, comprising a worm housing portion for housing the worm, and a worm wheel housing portion having a bottom shape for housing a worm wheel meshing with the worm;
A motor with a speed reduction mechanism having a bottom cover that covers the opening of the worm wheel housing portion,
A locking claw provided on the outer periphery of the bottom cover and extending along the outer wall surface of the worm wheel housing portion;
A convex piece that is provided on either the locking claw or the outer wall surface of the worm wheel housing portion and projects toward the other of the locking claw or the outer wall surface of the worm wheel housing portion;
A groove that is provided on the other surface of the locking claw or the outer wall surface of the worm wheel housing portion, and into which the convex piece is inserted to engage with the convex piece;
Wherein provided on the outer wall surface of the worm wheel housing portion, it has a wall portion covering the side surfaces and tip end surface of the locking pawl,
A motor with a speed reduction mechanism, wherein the bottom cover is provided with a seal member that seals the worm wheel housing and transmits the rotation of the worm wheel . 請求項１または２記載の減速機構付モータにおいて、前記壁部は前記係止爪の側面全体を覆うことを特徴とする減速機構付モータ。   3. The motor with a speed reduction mechanism according to claim 1, wherein the wall portion covers the entire side surface of the locking claw. 請求項１〜３のいずれか１項に記載の減速機構付モータにおいて、前記凸片および前記溝は、前記ウォームホイール収容部の径方向に形成された係合面により係合されることを特徴とする減速機構付モータ。   4. The motor with a speed reduction mechanism according to claim 1, wherein the convex piece and the groove are engaged by an engagement surface formed in a radial direction of the worm wheel housing portion. A motor with a reduction mechanism. 請求項１〜４のいずれか１項に記載の減速機構付モータにおいて、前記壁部は前記係止爪よりも前記ウォームホイール収容部の径方向に対して外径側に突出して形成されていることを特徴とする減速機構付モータ。
5. The motor with a speed reduction mechanism according to claim 1, wherein the wall portion is formed to protrude toward an outer diameter side with respect to a radial direction of the worm wheel housing portion with respect to the locking claw. A motor with a speed reduction mechanism.
JP2008210023A 2008-08-18 2008-08-18 Motor with reduction mechanism Active JP5173668B2 (en)

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JP2008210023A JP5173668B2 (en) 2008-08-18 2008-08-18 Motor with reduction mechanism
PCT/JP2009/064314 WO2010021294A1 (en) 2008-08-18 2009-08-13 Motor with deceleration mechanism
US13/058,991 US8627745B2 (en) 2008-08-18 2009-08-13 Motor with speed reduction mechanism
CN200980132281.3A CN102124636B (en) 2008-08-18 2009-08-13 motor with reduction mechanism
BRPI0917876-7A BRPI0917876B1 (en) 2008-08-18 2009-08-13 ENGINE WITH A SPEED REDUCTION MECHANISM
EP09808230.8A EP2320541B1 (en) 2008-08-18 2009-08-13 Motor with deceleration mechanism

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